Show HN: Agentctl, a local control plane for coding agents

I’ve been building agentctl, a small Go tool that sits between coding agents and the risky actions they want to take: package installs, shell execution, secret access, file writes, outbound API calls. The design is deliberately narrow and local-first. No HTTP server, no hosted component, no repo-level config sprawl. Everything lives under ~/.agentctl/. Policy is yours, traces are yours.

The workflow I keep coming back to: write a permissive policy, let the agent run for a week, then tighten the rules and replay the old sessions to see what would have been blocked. Much better than guessing at policy upfront, and it’s the part of the tool I didn’t expect to use as much as I do.

Every gated decision gets written to jsonl, so you can grep, diff, or feed traces back through a stricter policy without re-running the agent. There’s also a TUI for browsing sessions, inspecting individual gate decisions, and stepping through replays interactively, which makes it easier to spot patterns across runs.

Currently works with Claude Code and MCP-based clients like Codex.

Still a WIP and mostly a project for myself, but figured others experimenting with coding agents might find it interesting.

GitHub: https://github.com/chocks/agentctl